Wolfgang Amadeus Mozart's final Masterpiece was composed in 1791 Mozart began his final composition in Prague, suffering from an undetermined illness, which would eventually take his life and rob him of the chance to see the completion of this song.

After Mozart's death, his understudy 'Franz Xaver Süssmayr', at the request of Mozart's wife, completed the missing parts of the Requiem.

Requiem Mass was first performed on January 2, 1793, in a private concert for the benefit of Mozart's grieving wife, Constanze Mozart.